Free courses designed specifically for interactive study via the web, provided by MIT, Harvard and Berkeley.

Number to Know

33: Trapped in the Closet is a rap opera by American R&B singer R. Kelly, which currently consists of 33 whole "chapters" released from 2005 to 2012.

This Day in History

Jan. 8, 2011: The attempted assassination of Arizona Rep. Gabrielle Giffords and subsequent shooting in Casas Adobes, Ariz., at a Safeway grocery store, for which Jared Lee Loughner is subsequently arrested, kills six people and wounds 13, including Giffords.